State analysis of fluorine-doped SnO2 (FTO) by 57Fe Mossbauer spectroscopy

被引：0

作者：

Nomura, Kiyoshi ^{[1
,2
]}

Sasaki, Maho ^{[2
]}

Saito, Rintarou ^{[2
]}

Koike, Yuya ^{[2
]}

Kubuki, Shiro ^{[1
]}

Nakanishi, Akio ^{[3
]}

机构：

[1] Tokyo Metropolitan Univ, Radioisotope Ctr, Hatiouji, Tokyo 1920364, Japan

[2] Meiji Univ, Appl Chem, Kawasaki, Kanagawa 2148571, Japan

[3] Shiga Univ Med Sci, Phys, Otsu, Shiga 5202192, Japan

来源：

HYPERFINE INTERACTIONS | 2019年 / 240卷 / 01期

关键词：

Fe doped FTO; Fe doped SnO2; Dilutemagnetism; Mossbauer spectroscopy; CEMS;

D O I：

10.1007/s10751-019-1656-x

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Fe doped FTO powders were prepared by a chemical precipitation method. Mossbauer spectra of FTO with several concentrations of Fe dopants were decomposed into two doublets (D1 and D2). A doublet with a small electric field gradient (D1) is assigned to Fe3+ in a small distorted site of the rutile structure, and another doublet (D2) to Fe3+ in a large distorted site due to F- ion and oxygen defect. Furthermore, with increase of the annealing temperature the isomer shifts tended to decrease. It suggests that Fe3+ bonds are more covalently bonded than ionic at the higher annealing temperatures. The surface layer of grains were also characterized by Fe-57 CEMS. The defect structures of Fe doped FTO were estimated using the oxygen defect models of tin oxide

引用

页数：7

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